package com.neu.gulimall.product.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@EnableConfigurationProperties(CacheProperties.class)
@EnableCaching
@Configuration
public class MyCacheConfig {

    // 使用方式一：
//    @Autowired
//    private CacheProperties cacheProperties;
    /**
     * 当声明了自定义的 RedisCacheConfiguration 配置对象
     * 默认的配置文件中的配置就没有用上
     *
     * 1、原来和配置文件绑定的配置类是这样子的
     * @ConfigurationProperties(prefix = "spring.cache")
     * public class CacheProperties {
     * 2、要让它生效
     *  2.1 @EnableConfigurationProperties(CacheProperties.class)
     *  2.2
     *  使用方式一：自动注入
     *     @Autowired
     *     private CacheProperties cacheProperties;
     *  使用方式二：
     *      作为方法的形参,会自动从容器中获取到该对象
     *      public RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){
     * @return
     */
    @Bean
    public RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){

        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();

        config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));

        CacheProperties.Redis redisProperties = cacheProperties.getRedis();
        // 让配置文件中的所有配置都生效
        if (redisProperties.getTimeToLive() != null) {
            config = config.entryTtl(redisProperties.getTimeToLive());
        }

        if (redisProperties.getKeyPrefix() != null) {
            config = config.prefixKeysWith(redisProperties.getKeyPrefix());
        }

        if (!redisProperties.isCacheNullValues()) {
            config = config.disableCachingNullValues();
        }

        if (!redisProperties.isUseKeyPrefix()) {
            config = config.disableKeyPrefix();
        }

        return config;
    }

}
